Bubble columns are immediately heated to their target temperature, and since the only heating options for them are +100C/+300C, it is impossible for them to be in any temperature that isn't these 3 temperatures. I don't know if this is a problem for any practical purposes at the moment, since I encountered it when trying to extract methanol from water solution for experimental purposes.

This is intentional, as Bubble Caps do not simulate thermodynamics like the Vat. For finer control with distillation, use a Vat. Thanks for the feedback anyway :)